Fun and addictive game! I cannot rate it, since I’m not a participant myself, but I thought I’d leave a comment. I wish I could play in fullscreen. Using the arrow keys are making the whole page scroll, not only moving the UFO in the game. If I use “wasd”, then the page doesn’t scroll, so it’s OK.
I think the look and feel is cohesive, retro and cool. I like the CRT effect and the parallax stars. I personally think the stars could move even when the UFO doesn’t move, but I think this choice was deliberate. It works well either way. I also like the screen shake and effects when being hit by the bullets.
It’s also a good contrast between bullets and environment, making it easy to navigate and evade the bullet hell.
I’m not sure how fast the difficulty increases, because I only saved 5 cows, but I hope it gets more and more difficult each level. Good job on this entry.